<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            padding: 20rpx 6rpx 20rpx 30rpx;
            width: 100%;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        .item{
            margin-right: 24rpx;
            width: calc((100% - 24rpx * 3) / 3);
            margin-bottom: 30rpx;
			
			
            /* 底下这部分不是很关键 */
            height: 140rpx;
            background-color: #FFFFFF;
            border-radius: 10rpx;
            box-shadow: 4rpx 4rpx 4rpx #234;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .v1-box:after {
            content: "";
            flex: auto;
        }   
    </style>
</head>
<body>
    <div class="box">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
        <div class="item">4</div>
        <div class="item">5</div>
        <div class="item">6</div>
    </div>

</body>
</html>